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熔盐堆余热排出系统闪蒸流动的不稳定性
Flashing flow instability in molten salt reactors residual heat removal system
- 核技术 2017年40卷第12期 文章编号：120601
- 作者机构：
1.哈尔滨工程大学 核安全与仿真技术国防重点学科实验室 哈尔滨 150001
2.中国科学院上海应用物理研究所 嘉定园区 上海 201800
- 作者简介：
[ "杨宗昊, 男, 1992年出生, 2015年毕业于哈尔滨工程大学, 现为硕士研究生, 核科学与核技术专业", "YANG Zonghao, male, born in 1992, graduated from Harbin Engineering University in 2015, master student, major in nuclear science and technology" ]
阎昌琪, E-mail:changqi_yan@163.com YAN Changqi, E-mail:changqi_yan@163.com
- 基金信息：国家自然科学基金(11475048)
DOI：10.11889/j.0253-3219.2017.hjs.40.120601
中图分类号： TL426收稿日期：2016-12-27，
修回日期：2017-03-22，
纸质出版日期：2017-12-10
- 稿件说明：
移动端阅览
杨宗昊, 孟兆明, 阎昌琪, 等. 熔盐堆余热排出系统闪蒸流动的不稳定性[J]. 核技术, 2017,40(12):120601
Zonghao YANG, Zhaoming MENG, Changqi YAN, et al. Flashing flow instability in molten salt reactors residual heat removal system[J]. Nuclear techniques, 2017, 40(12): 120601
杨宗昊, 孟兆明, 阎昌琪, 等. 熔盐堆余热排出系统闪蒸流动的不稳定性[J]. 核技术, 2017,40(12):120601 DOI： 10.11889/j.0253-3219.2017.hjs.40.120601.
Zonghao YANG, Zhaoming MENG, Changqi YAN, et al. Flashing flow instability in molten salt reactors residual heat removal system[J]. Nuclear techniques, 2017, 40(12): 120601 DOI： 10.11889/j.0253-3219.2017.hjs.40.120601.
摘要
套管式换热元件是熔盐堆非能动余热排出系统的重要组成部分之一。设计并搭建了单根套管式换热元件自然循环实验台，模拟熔盐堆停堆后排盐罐中熔盐的显热与衰变热的导出过程。在这种以套管式换热元件为基础的自然循环回路中，发现了闪蒸流动不稳定现象的存在。分析了在闪蒸过程中压力与温度的变化情况，以及这种闪蒸流动不稳定性的特点，并研究了在闪蒸过程中的换热系数的变化情况。结果表明，当外层套管外壁温度从440 ℃上升到700 ℃时，单根套管式换热元件的换热量会从550 W上升到1 900 W。此外，在闪蒸过程中，换热元件中的沸腾换热系数在800-1 700 W·（m
2
·K）
-1
之间变化，换热元件壁温与自然循环流量的周期性变化引起管壁周期性热应力与系统的周期性机械振动。因此，在熔盐堆余热排出系统的设计过程中，为保证热量导出的安全性与稳定性，需要考虑到闪蒸现象。
Abstract
Background
2
In contrast with pressure water reactor
molten salt reactors (MSR) have low pressure
small size
high multiplication efficiency
and little residual radioactivity. The residual heat removal system is an important part of nuclear power reactor to ensure the reactor safety. However
little attention has been paid to the passive residual heat removal system (PRHRS) of the molten salt reactor in the literature so far.
Purpose
2
This study aims to make some preliminary work for the design of the passive residual heat removal system and to make sure the safety and stability of residual heat removal of MSRs.
Methods
2
The heat transfers and flow characteristics are analyzed for the cooling thimble of MSRs. An experimental loop is designed and built with a single heat transfer element to simulate the sensible heat and decay heat removal process in drain salt tank when the reactor is shut down. The changes of pressure and temperature are analyzed through which the characteristics of flashing flow instability are studied. Moreover
the changes of heat transfer coefficients are analyzed.
Results
2
The heat transfer rate increases from 550 W to 1 900 W when the thimble outer wall temperature increases from 440 ℃ to 700 ℃. And the heat transfer coefficient changes from 800 W·(m
2
·K)
-1
to 1 700 W·(m
2
·K)
-1
during the flashing process.
Conclusion
2
The flashing phenomenon will cause the periodical change of natural circulation flow rate and temperature of pipe wall
resulting in the periodic fluctuation of wall temperature and periodic mechanical vibration of the system. In the process of designing the molten salt reactor passive heat removal system
the flashing flow instability phenomenon should be taken into consideration to ensure the safety and stability of heat removal.
关键词
Keywords
references
Holcomb D E, Flanagan G F, Mays G T, et al . Fluoride salt-cooled high-temperature reactor technology development and demonstration roadmap[R]. Office of Scientific & Technical Information Technical Reports, 2013. DOI: 10.2172/1107839. http://dx.doi.org/10.2172/1107839.
T Ishiguro , W F G van Rooijen , Y Shimazu , . Design of a passive residual heat removal system for the FUJI-233Um molten salt reactor system . Annals of Nuclear Energy , 2014 . 73 398 - 407 . DOI: 10.1016/j.anucene.2013.08.037 http://doi.org/10.1016/j.anucene.2013.08.037 .
Ignatiev V, Feynberg O, GnidoiI, et al. Progress in development of Li, Be, Na/F molten salt actinide recycler & transmuter concept[C]. Proceedings of ICAPP 2007, Nice, France, 2007:7548.
Merle-Lucotte E, Heuer D, Allibert M, et al. Launching the thorium fuel cycle with the molten salt fast reactor[C]. International Congress on Advances in Nuclear Power Plants, 2011.
孙 露 , 孙 立成 , 阎 昌琪 . ORNL 10 MW熔盐实验堆(MSRE)排盐罐冷却系统热工水力特性分析 . 核技术 , 2012 . 35 ( 10 ): 72 - 76 . http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hjsu201210014&dbname=CJFD&dbcode=CJFQ .
Lu SUN , Licheng SUN , Changqi YAN . Thermalhydraulic analysis of bayonet cooling thimble in fuel drain tank of ORNL 10 MW MSRE . Nuclear Technology , 2012 . 35 ( 10 ): 72 - 76 . http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hjsu201210014&dbname=CJFD&dbcode=CJFQ .
Molten-Salt reactor program semiannual progress report[R]. Oak Ridge National Laboratory, ORNL-3529, 1963. DOI: 10.2172/4106714. http://dx.doi.org/10.2172/4106714.
杨 瑞昌 , 唐 虹 , 王 彦武 . 自然循环过冷沸腾流动不稳定性的研究 . 工程热物理学报 , 2004 . 25 ( 3 ): 435 - 438 . DOI: 10.3321/j.issn:0253-231X.2004.03.022 http://doi.org/10.3321/j.issn:0253-231X.2004.03.022 .
Ruichang YANG , Hong TANG , Yanwu WANG . Study on flow instability in a natural circulation system with subcooled boiling . Journal of Engineering Thermophysics , 2004 . 25 ( 3 ): 435 - 438 . DOI: 10.3321/j.issn:0253-231X.2004.03.022 http://doi.org/10.3321/j.issn:0253-231X.2004.03.022 .
吴 莘馨 , 吴 少融 , 姜 胜耀 , . 闪蒸现象及其对自然循环稳定性的影响 . 中国核科技报告 , 1991 . ( S3 ): 238 - 248 . http://www.cqvip.com/QK/90373X/201606/669321202.html .
Xinxin WU , Shaorong WU , Shengyao JIANG , . Flashing in riser and its effect on flow stability in natural circulation system . China Nuclear Science and Technology Report , 1991 . ( S3 ): 238 - 248 . http://www.cqvip.com/QK/90373X/201606/669321202.html .
S Y Jiang , M S Yao , J H Bo , . Experimental simulation study on start-up of the 5 MW nuclear heating reactor . Nuclear Engineering & Design , 1995 . 158 ( 1 ): 111 - 123 . DOI: 10.1016/0029-5493(95)01020-I http://doi.org/10.1016/0029-5493(95)01020-I .
M Furuya , F Inada , T H J J van der Hagen . Flashing-induced density wave oscillations in a natural circulation BWR-mechanism of instability and stability map . Nuclear Engineering & Design , 2005 . 235 ( 15 ): 1557 - 1569 . DOI: 10.1016/j.nucengdes.2005.01.006 http://doi.org/10.1016/j.nucengdes.2005.01.006 .
X Hou , Z Sun , J Su , . An investigation on flashing instability induced water hammer in an open natural circulation system . Progress in Nuclear Energy , 2016 . 93 418 - 430 . DOI: 10.1016/j.pnucene.2016.09.015 http://doi.org/10.1016/j.pnucene.2016.09.015 .
Cantor S, Cooke J W, Dworkin A S, et al . Physical properties of molten-salt reactor fuel[R]. Oak Ridge National Lab, ORNL-TM-2316, 1968. DOI: 10.2172/4492893. http://dx.doi.org/10.2172/4492893.
S J Kline , F A Mcclintock . Describing uncertainties in single-sample experiments . Mechanical Engineering , 1953 . 75 ( 1 ): 3 - 8 . http://www.mendeley.com/catalog/describing-uncertainties-singlesample-experiments/ .
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